"Windows Time service, also known as W32Time, synchronizes the date & time for all computers running in an AD DS domain. Time synchronization is critical for proper operation of many Windows services and line-of-business apps. WTS uses Network Time Protocol to synchronize computer clocks on network so that an accurate clock value, or time stamp, can be assigned to network validation & resource access requests. The service integrates NTP and time providers, making it a reliable and scalable time service for enterprise administrators," Microsoft revealed. WTS Technical Reference was published on TechNet earlier this year and is accessible free of charge to all IT professionals interested in getting a deeper insight into W32Time. TR offered was designed to consolidate the information available on Windows Time (w32time) in all of company's operating systems.
More Info: Windows Time Service Technical Reference